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sys/geom/shsec/g_shsec.c
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1 /*- 2 * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD: releng/9.0/sys/geom/shsec/g_shsec.c 223921 2011-07-11 05:22:31Z ae $"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <sys/lock.h> 35 #include <sys/mutex.h> 36 #include <sys/bio.h> 37 #include <sys/sbuf.h> 38 #include <sys/sysctl.h> 39 #include <sys/malloc.h> 40 #include <vm/uma.h> 41 #include <geom/geom.h> 42 #include <geom/shsec/g_shsec.h> 43 44 FEATURE(geom_shsec, "GEOM shared secret device support"); 45 46 static MALLOC_DEFINE(M_SHSEC, "shsec_data", "GEOM_SHSEC Data"); 47 48 static uma_zone_t g_shsec_zone; 49 50 static int g_shsec_destroy(struct g_shsec_softc *sc, boolean_t force); 51 static int g_shsec_destroy_geom(struct gctl_req *req, struct g_class *mp, 52 struct g_geom *gp); 53 54 static g_taste_t g_shsec_taste; 55 static g_ctl_req_t g_shsec_config; 56 static g_dumpconf_t g_shsec_dumpconf; 57 static g_init_t g_shsec_init; 58 static g_fini_t g_shsec_fini; 59 60 struct g_class g_shsec_class = { 61 .name = G_SHSEC_CLASS_NAME, 62 .version = G_VERSION, 63 .ctlreq = g_shsec_config, 64 .taste = g_shsec_taste, 65 .destroy_geom = g_shsec_destroy_geom, 66 .init = g_shsec_init, 67 .fini = g_shsec_fini 68 }; 69 70 SYSCTL_DECL(_kern_geom); 71 SYSCTL_NODE(_kern_geom, OID_AUTO, shsec, CTLFLAG_RW, 0, "GEOM_SHSEC stuff"); 72 static u_int g_shsec_debug = 0; 73 TUNABLE_INT("kern.geom.shsec.debug", &g_shsec_debug); 74 SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, debug, CTLFLAG_RW, &g_shsec_debug, 0, 75 "Debug level"); 76 static u_int g_shsec_maxmem = MAXPHYS * 100; 77 TUNABLE_INT("kern.geom.shsec.maxmem", &g_shsec_maxmem); 78 SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, maxmem, CTLFLAG_RD, &g_shsec_maxmem, 79 0, "Maximum memory that can be allocated for I/O (in bytes)"); 80 static u_int g_shsec_alloc_failed = 0; 81 SYSCTL_UINT(_kern_geom_shsec, OID_AUTO, alloc_failed, CTLFLAG_RD, 82 &g_shsec_alloc_failed, 0, "How many times I/O allocation failed"); 83 84 /* 85 * Greatest Common Divisor. 86 */ 87 static u_int 88 gcd(u_int a, u_int b) 89 { 90 u_int c; 91 92 while (b != 0) { 93 c = a; 94 a = b; 95 b = (c % b); 96 } 97 return (a); 98 } 99 100 /* 101 * Least Common Multiple. 102 */ 103 static u_int 104 lcm(u_int a, u_int b) 105 { 106 107 return ((a * b) / gcd(a, b)); 108 } 109 110 static void 111 g_shsec_init(struct g_class *mp __unused) 112 { 113 114 g_shsec_zone = uma_zcreate("g_shsec_zone", MAXPHYS, NULL, NULL, NULL, 115 NULL, 0, 0); 116 g_shsec_maxmem -= g_shsec_maxmem % MAXPHYS; 117 uma_zone_set_max(g_shsec_zone, g_shsec_maxmem / MAXPHYS); 118 } 119 120 static void 121 g_shsec_fini(struct g_class *mp __unused) 122 { 123 124 uma_zdestroy(g_shsec_zone); 125 } 126 127 /* 128 * Return the number of valid disks. 129 */ 130 static u_int 131 g_shsec_nvalid(struct g_shsec_softc *sc) 132 { 133 u_int i, no; 134 135 no = 0; 136 for (i = 0; i < sc->sc_ndisks; i++) { 137 if (sc->sc_disks[i] != NULL) 138 no++; 139 } 140 141 return (no); 142 } 143 144 static void 145 g_shsec_remove_disk(struct g_consumer *cp) 146 { 147 struct g_shsec_softc *sc; 148 u_int no; 149 150 KASSERT(cp != NULL, ("Non-valid disk in %s.", __func__)); 151 sc = (struct g_shsec_softc *)cp->private; 152 KASSERT(sc != NULL, ("NULL sc in %s.", __func__)); 153 no = cp->index; 154 155 G_SHSEC_DEBUG(0, "Disk %s removed from %s.", cp->provider->name, 156 sc->sc_name); 157 158 sc->sc_disks[no] = NULL; 159 if (sc->sc_provider != NULL) { 160 g_orphan_provider(sc->sc_provider, ENXIO); 161 sc->sc_provider = NULL; 162 G_SHSEC_DEBUG(0, "Device %s removed.", sc->sc_name); 163 } 164 165 if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0) 166 g_access(cp, -cp->acr, -cp->acw, -cp->ace); 167 g_detach(cp); 168 g_destroy_consumer(cp); 169 } 170 171 static void 172 g_shsec_orphan(struct g_consumer *cp) 173 { 174 struct g_shsec_softc *sc; 175 struct g_geom *gp; 176 177 g_topology_assert(); 178 gp = cp->geom; 179 sc = gp->softc; 180 if (sc == NULL) 181 return; 182 183 g_shsec_remove_disk(cp); 184 /* If there are no valid disks anymore, remove device. */ 185 if (g_shsec_nvalid(sc) == 0) 186 g_shsec_destroy(sc, 1); 187 } 188 189 static int 190 g_shsec_access(struct g_provider *pp, int dr, int dw, int de) 191 { 192 struct g_consumer *cp1, *cp2; 193 struct g_shsec_softc *sc; 194 struct g_geom *gp; 195 int error; 196 197 gp = pp->geom; 198 sc = gp->softc; 199 200 if (sc == NULL) { 201 /* 202 * It looks like geom is being withered. 203 * In that case we allow only negative requests. 204 */ 205 KASSERT(dr <= 0 && dw <= 0 && de <= 0, 206 ("Positive access request (device=%s).", pp->name)); 207 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && 208 (pp->ace + de) == 0) { 209 G_SHSEC_DEBUG(0, "Device %s definitely destroyed.", 210 gp->name); 211 } 212 return (0); 213 } 214 215 /* On first open, grab an extra "exclusive" bit */ 216 if (pp->acr == 0 && pp->acw == 0 && pp->ace == 0) 217 de++; 218 /* ... and let go of it on last close */ 219 if ((pp->acr + dr) == 0 && (pp->acw + dw) == 0 && (pp->ace + de) == 0) 220 de--; 221 222 error = ENXIO; 223 LIST_FOREACH(cp1, &gp->consumer, consumer) { 224 error = g_access(cp1, dr, dw, de); 225 if (error == 0) 226 continue; 227 /* 228 * If we fail here, backout all previous changes. 229 */ 230 LIST_FOREACH(cp2, &gp->consumer, consumer) { 231 if (cp1 == cp2) 232 return (error); 233 g_access(cp2, -dr, -dw, -de); 234 } 235 /* NOTREACHED */ 236 } 237 238 return (error); 239 } 240 241 static void 242 g_shsec_xor1(uint32_t *src, uint32_t *dst, ssize_t len) 243 { 244 245 for (; len > 0; len -= sizeof(uint32_t), dst++) 246 *dst = *dst ^ *src++; 247 KASSERT(len == 0, ("len != 0 (len=%zd)", len)); 248 } 249 250 static void 251 g_shsec_done(struct bio *bp) 252 { 253 struct g_shsec_softc *sc; 254 struct bio *pbp; 255 256 pbp = bp->bio_parent; 257 sc = pbp->bio_to->geom->softc; 258 if (bp->bio_error == 0) 259 G_SHSEC_LOGREQ(2, bp, "Request done."); 260 else { 261 G_SHSEC_LOGREQ(0, bp, "Request failed (error=%d).", 262 bp->bio_error); 263 if (pbp->bio_error == 0) 264 pbp->bio_error = bp->bio_error; 265 } 266 if (pbp->bio_cmd == BIO_READ) { 267 if ((pbp->bio_pflags & G_SHSEC_BFLAG_FIRST) != 0) { 268 bcopy(bp->bio_data, pbp->bio_data, pbp->bio_length); 269 pbp->bio_pflags = 0; 270 } else { 271 g_shsec_xor1((uint32_t *)bp->bio_data, 272 (uint32_t *)pbp->bio_data, 273 (ssize_t)pbp->bio_length); 274 } 275 } 276 bzero(bp->bio_data, bp->bio_length); 277 uma_zfree(g_shsec_zone, bp->bio_data); 278 g_destroy_bio(bp); 279 pbp->bio_inbed++; 280 if (pbp->bio_children == pbp->bio_inbed) { 281 pbp->bio_completed = pbp->bio_length; 282 g_io_deliver(pbp, pbp->bio_error); 283 } 284 } 285 286 static void 287 g_shsec_xor2(uint32_t *rand, uint32_t *dst, ssize_t len) 288 { 289 290 for (; len > 0; len -= sizeof(uint32_t), dst++) { 291 *rand = arc4random(); 292 *dst = *dst ^ *rand++; 293 } 294 KASSERT(len == 0, ("len != 0 (len=%zd)", len)); 295 } 296 297 static void 298 g_shsec_start(struct bio *bp) 299 { 300 TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 301 struct g_shsec_softc *sc; 302 struct bio *cbp; 303 uint32_t *dst; 304 ssize_t len; 305 u_int no; 306 int error; 307 308 sc = bp->bio_to->geom->softc; 309 /* 310 * If sc == NULL, provider's error should be set and g_shsec_start() 311 * should not be called at all. 312 */ 313 KASSERT(sc != NULL, 314 ("Provider's error should be set (error=%d)(device=%s).", 315 bp->bio_to->error, bp->bio_to->name)); 316 317 G_SHSEC_LOGREQ(2, bp, "Request received."); 318 319 switch (bp->bio_cmd) { 320 case BIO_READ: 321 case BIO_WRITE: 322 case BIO_FLUSH: 323 /* 324 * Only those requests are supported. 325 */ 326 break; 327 case BIO_DELETE: 328 case BIO_GETATTR: 329 /* To which provider it should be delivered? */ 330 default: 331 g_io_deliver(bp, EOPNOTSUPP); 332 return; 333 } 334 335 /* 336 * Allocate all bios first and calculate XOR. 337 */ 338 dst = NULL; 339 len = bp->bio_length; 340 if (bp->bio_cmd == BIO_READ) 341 bp->bio_pflags = G_SHSEC_BFLAG_FIRST; 342 for (no = 0; no < sc->sc_ndisks; no++) { 343 cbp = g_clone_bio(bp); 344 if (cbp == NULL) { 345 error = ENOMEM; 346 goto failure; 347 } 348 TAILQ_INSERT_TAIL(&queue, cbp, bio_queue); 349 350 /* 351 * Fill in the component buf structure. 352 */ 353 cbp->bio_done = g_shsec_done; 354 cbp->bio_data = uma_zalloc(g_shsec_zone, M_NOWAIT); 355 if (cbp->bio_data == NULL) { 356 g_shsec_alloc_failed++; 357 error = ENOMEM; 358 goto failure; 359 } 360 cbp->bio_caller2 = sc->sc_disks[no]; 361 if (bp->bio_cmd == BIO_WRITE) { 362 if (no == 0) { 363 dst = (uint32_t *)cbp->bio_data; 364 bcopy(bp->bio_data, dst, len); 365 } else { 366 g_shsec_xor2((uint32_t *)cbp->bio_data, dst, 367 len); 368 } 369 } 370 } 371 /* 372 * Fire off all allocated requests! 373 */ 374 while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 375 struct g_consumer *cp; 376 377 TAILQ_REMOVE(&queue, cbp, bio_queue); 378 cp = cbp->bio_caller2; 379 cbp->bio_caller2 = NULL; 380 cbp->bio_to = cp->provider; 381 G_SHSEC_LOGREQ(2, cbp, "Sending request."); 382 g_io_request(cbp, cp); 383 } 384 return; 385 failure: 386 while ((cbp = TAILQ_FIRST(&queue)) != NULL) { 387 TAILQ_REMOVE(&queue, cbp, bio_queue); 388 bp->bio_children--; 389 if (cbp->bio_data != NULL) { 390 bzero(cbp->bio_data, cbp->bio_length); 391 uma_zfree(g_shsec_zone, cbp->bio_data); 392 } 393 g_destroy_bio(cbp); 394 } 395 if (bp->bio_error == 0) 396 bp->bio_error = error; 397 g_io_deliver(bp, bp->bio_error); 398 } 399 400 static void 401 g_shsec_check_and_run(struct g_shsec_softc *sc) 402 { 403 off_t mediasize, ms; 404 u_int no, sectorsize = 0; 405 406 if (g_shsec_nvalid(sc) != sc->sc_ndisks) 407 return; 408 409 sc->sc_provider = g_new_providerf(sc->sc_geom, "shsec/%s", sc->sc_name); 410 /* 411 * Find the smallest disk. 412 */ 413 mediasize = sc->sc_disks[0]->provider->mediasize; 414 mediasize -= sc->sc_disks[0]->provider->sectorsize; 415 sectorsize = sc->sc_disks[0]->provider->sectorsize; 416 for (no = 1; no < sc->sc_ndisks; no++) { 417 ms = sc->sc_disks[no]->provider->mediasize; 418 ms -= sc->sc_disks[no]->provider->sectorsize; 419 if (ms < mediasize) 420 mediasize = ms; 421 sectorsize = lcm(sectorsize, 422 sc->sc_disks[no]->provider->sectorsize); 423 } 424 sc->sc_provider->sectorsize = sectorsize; 425 sc->sc_provider->mediasize = mediasize; 426 g_error_provider(sc->sc_provider, 0); 427 428 G_SHSEC_DEBUG(0, "Device %s activated.", sc->sc_name); 429 } 430 431 static int 432 g_shsec_read_metadata(struct g_consumer *cp, struct g_shsec_metadata *md) 433 { 434 struct g_provider *pp; 435 u_char *buf; 436 int error; 437 438 g_topology_assert(); 439 440 error = g_access(cp, 1, 0, 0); 441 if (error != 0) 442 return (error); 443 pp = cp->provider; 444 g_topology_unlock(); 445 buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize, 446 &error); 447 g_topology_lock(); 448 g_access(cp, -1, 0, 0); 449 if (buf == NULL) 450 return (error); 451 452 /* Decode metadata. */ 453 shsec_metadata_decode(buf, md); 454 g_free(buf); 455 456 return (0); 457 } 458 459 /* 460 * Add disk to given device. 461 */ 462 static int 463 g_shsec_add_disk(struct g_shsec_softc *sc, struct g_provider *pp, u_int no) 464 { 465 struct g_consumer *cp, *fcp; 466 struct g_geom *gp; 467 struct g_shsec_metadata md; 468 int error; 469 470 /* Metadata corrupted? */ 471 if (no >= sc->sc_ndisks) 472 return (EINVAL); 473 474 /* Check if disk is not already attached. */ 475 if (sc->sc_disks[no] != NULL) 476 return (EEXIST); 477 478 gp = sc->sc_geom; 479 fcp = LIST_FIRST(&gp->consumer); 480 481 cp = g_new_consumer(gp); 482 error = g_attach(cp, pp); 483 if (error != 0) { 484 g_destroy_consumer(cp); 485 return (error); 486 } 487 488 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) { 489 error = g_access(cp, fcp->acr, fcp->acw, fcp->ace); 490 if (error != 0) { 491 g_detach(cp); 492 g_destroy_consumer(cp); 493 return (error); 494 } 495 } 496 497 /* Reread metadata. */ 498 error = g_shsec_read_metadata(cp, &md); 499 if (error != 0) 500 goto fail; 501 502 if (strcmp(md.md_magic, G_SHSEC_MAGIC) != 0 || 503 strcmp(md.md_name, sc->sc_name) != 0 || md.md_id != sc->sc_id) { 504 G_SHSEC_DEBUG(0, "Metadata on %s changed.", pp->name); 505 goto fail; 506 } 507 508 cp->private = sc; 509 cp->index = no; 510 sc->sc_disks[no] = cp; 511 512 G_SHSEC_DEBUG(0, "Disk %s attached to %s.", pp->name, sc->sc_name); 513 514 g_shsec_check_and_run(sc); 515 516 return (0); 517 fail: 518 if (fcp != NULL && (fcp->acr > 0 || fcp->acw > 0 || fcp->ace > 0)) 519 g_access(cp, -fcp->acr, -fcp->acw, -fcp->ace); 520 g_detach(cp); 521 g_destroy_consumer(cp); 522 return (error); 523 } 524 525 static struct g_geom * 526 g_shsec_create(struct g_class *mp, const struct g_shsec_metadata *md) 527 { 528 struct g_shsec_softc *sc; 529 struct g_geom *gp; 530 u_int no; 531 532 G_SHSEC_DEBUG(1, "Creating device %s (id=%u).", md->md_name, md->md_id); 533 534 /* Two disks is minimum. */ 535 if (md->md_all < 2) { 536 G_SHSEC_DEBUG(0, "Too few disks defined for %s.", md->md_name); 537 return (NULL); 538 } 539 540 /* Check for duplicate unit */ 541 LIST_FOREACH(gp, &mp->geom, geom) { 542 sc = gp->softc; 543 if (sc != NULL && strcmp(sc->sc_name, md->md_name) == 0) { 544 G_SHSEC_DEBUG(0, "Device %s already configured.", 545 sc->sc_name); 546 return (NULL); 547 } 548 } 549 gp = g_new_geomf(mp, "%s", md->md_name); 550 sc = malloc(sizeof(*sc), M_SHSEC, M_WAITOK | M_ZERO); 551 gp->start = g_shsec_start; 552 gp->spoiled = g_shsec_orphan; 553 gp->orphan = g_shsec_orphan; 554 gp->access = g_shsec_access; 555 gp->dumpconf = g_shsec_dumpconf; 556 557 sc->sc_id = md->md_id; 558 sc->sc_ndisks = md->md_all; 559 sc->sc_disks = malloc(sizeof(struct g_consumer *) * sc->sc_ndisks, 560 M_SHSEC, M_WAITOK | M_ZERO); 561 for (no = 0; no < sc->sc_ndisks; no++) 562 sc->sc_disks[no] = NULL; 563 564 gp->softc = sc; 565 sc->sc_geom = gp; 566 sc->sc_provider = NULL; 567 568 G_SHSEC_DEBUG(0, "Device %s created (id=%u).", sc->sc_name, sc->sc_id); 569 570 return (gp); 571 } 572 573 static int 574 g_shsec_destroy(struct g_shsec_softc *sc, boolean_t force) 575 { 576 struct g_provider *pp; 577 struct g_geom *gp; 578 u_int no; 579 580 g_topology_assert(); 581 582 if (sc == NULL) 583 return (ENXIO); 584 585 pp = sc->sc_provider; 586 if (pp != NULL && (pp->acr != 0 || pp->acw != 0 || pp->ace != 0)) { 587 if (force) { 588 G_SHSEC_DEBUG(0, "Device %s is still open, so it " 589 "can't be definitely removed.", pp->name); 590 } else { 591 G_SHSEC_DEBUG(1, 592 "Device %s is still open (r%dw%de%d).", pp->name, 593 pp->acr, pp->acw, pp->ace); 594 return (EBUSY); 595 } 596 } 597 598 for (no = 0; no < sc->sc_ndisks; no++) { 599 if (sc->sc_disks[no] != NULL) 600 g_shsec_remove_disk(sc->sc_disks[no]); 601 } 602 603 gp = sc->sc_geom; 604 gp->softc = NULL; 605 KASSERT(sc->sc_provider == NULL, ("Provider still exists? (device=%s)", 606 gp->name)); 607 free(sc->sc_disks, M_SHSEC); 608 free(sc, M_SHSEC); 609 610 pp = LIST_FIRST(&gp->provider); 611 if (pp == NULL || (pp->acr == 0 && pp->acw == 0 && pp->ace == 0)) 612 G_SHSEC_DEBUG(0, "Device %s destroyed.", gp->name); 613 614 g_wither_geom(gp, ENXIO); 615 616 return (0); 617 } 618 619 static int 620 g_shsec_destroy_geom(struct gctl_req *req __unused, struct g_class *mp __unused, 621 struct g_geom *gp) 622 { 623 struct g_shsec_softc *sc; 624 625 sc = gp->softc; 626 return (g_shsec_destroy(sc, 0)); 627 } 628 629 static struct g_geom * 630 g_shsec_taste(struct g_class *mp, struct g_provider *pp, int flags __unused) 631 { 632 struct g_shsec_metadata md; 633 struct g_shsec_softc *sc; 634 struct g_consumer *cp; 635 struct g_geom *gp; 636 int error; 637 638 g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name); 639 g_topology_assert(); 640 641 /* Skip providers that are already open for writing. */ 642 if (pp->acw > 0) 643 return (NULL); 644 645 G_SHSEC_DEBUG(3, "Tasting %s.", pp->name); 646 647 gp = g_new_geomf(mp, "shsec:taste"); 648 gp->start = g_shsec_start; 649 gp->access = g_shsec_access; 650 gp->orphan = g_shsec_orphan; 651 cp = g_new_consumer(gp); 652 g_attach(cp, pp); 653 error = g_shsec_read_metadata(cp, &md); 654 g_detach(cp); 655 g_destroy_consumer(cp); 656 g_destroy_geom(gp); 657 if (error != 0) 658 return (NULL); 659 gp = NULL; 660 661 if (strcmp(md.md_magic, G_SHSEC_MAGIC) != 0) 662 return (NULL); 663 if (md.md_version > G_SHSEC_VERSION) { 664 G_SHSEC_DEBUG(0, "Kernel module is too old to handle %s.\n", 665 pp->name); 666 return (NULL); 667 } 668 /* 669 * Backward compatibility: 670 */ 671 /* There was no md_provsize field in earlier versions of metadata. */ 672 if (md.md_version < 1) 673 md.md_provsize = pp->mediasize; 674 675 if (md.md_provider[0] != '\0' && 676 !g_compare_names(md.md_provider, pp->name)) 677 return (NULL); 678 if (md.md_provsize != pp->mediasize) 679 return (NULL); 680 681 /* 682 * Let's check if device already exists. 683 */ 684 sc = NULL; 685 LIST_FOREACH(gp, &mp->geom, geom) { 686 sc = gp->softc; 687 if (sc == NULL) 688 continue; 689 if (strcmp(md.md_name, sc->sc_name) != 0) 690 continue; 691 if (md.md_id != sc->sc_id) 692 continue; 693 break; 694 } 695 if (gp != NULL) { 696 G_SHSEC_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 697 error = g_shsec_add_disk(sc, pp, md.md_no); 698 if (error != 0) { 699 G_SHSEC_DEBUG(0, "Cannot add disk %s to %s (error=%d).", 700 pp->name, gp->name, error); 701 return (NULL); 702 } 703 } else { 704 gp = g_shsec_create(mp, &md); 705 if (gp == NULL) { 706 G_SHSEC_DEBUG(0, "Cannot create device %s.", md.md_name); 707 return (NULL); 708 } 709 sc = gp->softc; 710 G_SHSEC_DEBUG(1, "Adding disk %s to %s.", pp->name, gp->name); 711 error = g_shsec_add_disk(sc, pp, md.md_no); 712 if (error != 0) { 713 G_SHSEC_DEBUG(0, "Cannot add disk %s to %s (error=%d).", 714 pp->name, gp->name, error); 715 g_shsec_destroy(sc, 1); 716 return (NULL); 717 } 718 } 719 return (gp); 720 } 721 722 static struct g_shsec_softc * 723 g_shsec_find_device(struct g_class *mp, const char *name) 724 { 725 struct g_shsec_softc *sc; 726 struct g_geom *gp; 727 728 LIST_FOREACH(gp, &mp->geom, geom) { 729 sc = gp->softc; 730 if (sc == NULL) 731 continue; 732 if (strcmp(sc->sc_name, name) == 0) 733 return (sc); 734 } 735 return (NULL); 736 } 737 738 static void 739 g_shsec_ctl_destroy(struct gctl_req *req, struct g_class *mp) 740 { 741 struct g_shsec_softc *sc; 742 int *force, *nargs, error; 743 const char *name; 744 char param[16]; 745 u_int i; 746 747 g_topology_assert(); 748 749 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 750 if (nargs == NULL) { 751 gctl_error(req, "No '%s' argument.", "nargs"); 752 return; 753 } 754 if (*nargs <= 0) { 755 gctl_error(req, "Missing device(s)."); 756 return; 757 } 758 force = gctl_get_paraml(req, "force", sizeof(*force)); 759 if (force == NULL) { 760 gctl_error(req, "No '%s' argument.", "force"); 761 return; 762 } 763 764 for (i = 0; i < (u_int)*nargs; i++) { 765 snprintf(param, sizeof(param), "arg%u", i); 766 name = gctl_get_asciiparam(req, param); 767 if (name == NULL) { 768 gctl_error(req, "No 'arg%u' argument.", i); 769 return; 770 } 771 sc = g_shsec_find_device(mp, name); 772 if (sc == NULL) { 773 gctl_error(req, "No such device: %s.", name); 774 return; 775 } 776 error = g_shsec_destroy(sc, *force); 777 if (error != 0) { 778 gctl_error(req, "Cannot destroy device %s (error=%d).", 779 sc->sc_name, error); 780 return; 781 } 782 } 783 } 784 785 static void 786 g_shsec_config(struct gctl_req *req, struct g_class *mp, const char *verb) 787 { 788 uint32_t *version; 789 790 g_topology_assert(); 791 792 version = gctl_get_paraml(req, "version", sizeof(*version)); 793 if (version == NULL) { 794 gctl_error(req, "No '%s' argument.", "version"); 795 return; 796 } 797 if (*version != G_SHSEC_VERSION) { 798 gctl_error(req, "Userland and kernel parts are out of sync."); 799 return; 800 } 801 802 if (strcmp(verb, "stop") == 0) { 803 g_shsec_ctl_destroy(req, mp); 804 return; 805 } 806 807 gctl_error(req, "Unknown verb."); 808 } 809 810 static void 811 g_shsec_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, 812 struct g_consumer *cp, struct g_provider *pp) 813 { 814 struct g_shsec_softc *sc; 815 816 sc = gp->softc; 817 if (sc == NULL) 818 return; 819 if (pp != NULL) { 820 /* Nothing here. */ 821 } else if (cp != NULL) { 822 sbuf_printf(sb, "%s<Number>%u</Number>\n", indent, 823 (u_int)cp->index); 824 } else { 825 sbuf_printf(sb, "%s<ID>%u</ID>\n", indent, (u_int)sc->sc_id); 826 sbuf_printf(sb, "%s<Status>Total=%u, Online=%u</Status>\n", 827 indent, sc->sc_ndisks, g_shsec_nvalid(sc)); 828 sbuf_printf(sb, "%s<State>", indent); 829 if (sc->sc_provider != NULL && sc->sc_provider->error == 0) 830 sbuf_printf(sb, "UP"); 831 else 832 sbuf_printf(sb, "DOWN"); 833 sbuf_printf(sb, "</State>\n"); 834 } 835 } 836 837 DECLARE_GEOM_CLASS(g_shsec_class, g_shsec);
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